Mathematica Wave eqaution PDE in mathematica

[flasherffff]

hi
i can't make DSolve solve the wave equation with simple bvc
ive gone through the mathematica documentation and can't find the answer

for the input


\text{DSolve}\left[\left\{u^{(2,0)}[x,t]==4 u^{(0,2)}[x,t],u[x,0]==1,u^{(0,1)}[x,0]==\text{Sin}[x]\right\},u,\{x,t\}\right]
it just return it unevaluated

 

[pmsrw3]

DSolve's ability to deal with PDE's is a little limited. Try solving the PDE without the BCs. This will give a solution in terms of two functions, C[1] and C[2]. Then use the BCs to solve for those.